Scientists and explorers have joined the Norwegian Prime Minister to mark 100 years since Roald Amundsen led the first expedition to the south pole. Prime Minister paid tribute to Amundsen as having made "one of the most outstanding achievements of mankind". Acknowledgment was also given to Robert Scott, the UK explorer whom Amundsen beat to the pole but who died along with four companions on the return expedition after being caught in a blizzard. The Prime Minister unveiled an ice bust of Amundsen at the US scientific base station Amundsen Scott. Amundsen's triumph came only six years after Norway became an independent nation.